/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.transaction.annotation;

import org.springframework.lang.Nullable;
import org.springframework.transaction.interceptor.DefaultTransactionAttribute;
import org.springframework.transaction.interceptor.TransactionAttribute;

import javax.ejb.ApplicationException;
import javax.ejb.TransactionAttributeType;
import java.io.Serializable;
import java.lang.reflect.AnnotatedElement;

/**
 * Strategy implementation for parsing EJB3's {@link javax.ejb.TransactionAttribute}
 * annotation.
 *
 * @author Juergen Hoeller
 * @since 2.5
 */
@SuppressWarnings("serial")
public class Ejb3TransactionAnnotationParser implements TransactionAnnotationParser, Serializable {

    @Override
    @Nullable
    public TransactionAttribute parseTransactionAnnotation(AnnotatedElement element) {
        javax.ejb.TransactionAttribute ann = element.getAnnotation(javax.ejb.TransactionAttribute.class);
        if (ann != null) {
            return parseTransactionAnnotation(ann);
        } else {
            return null;
        }
    }

    public TransactionAttribute parseTransactionAnnotation(javax.ejb.TransactionAttribute ann) {
        return new Ejb3TransactionAttribute(ann.value());
    }


    @Override
    public boolean equals(Object other) {
        return (this == other || other instanceof Ejb3TransactionAnnotationParser);
    }

    @Override
    public int hashCode() {
        return Ejb3TransactionAnnotationParser.class.hashCode();
    }


    /**
     * EJB3-specific TransactionAttribute, implementing EJB3's rollback rules
     * which are based on annotated exceptions.
     */
    private static class Ejb3TransactionAttribute extends DefaultTransactionAttribute {

        public Ejb3TransactionAttribute(TransactionAttributeType type) {
            setPropagationBehaviorName(PREFIX_PROPAGATION + type.name());
        }

        @Override
        public boolean rollbackOn(Throwable ex) {
            ApplicationException ann = ex.getClass().getAnnotation(ApplicationException.class);
            return (ann != null ? ann.rollback() : super.rollbackOn(ex));
        }
    }

}
